A modified form of cellulose found in the exoskeletons of insects and crustaceans is known as:
A. chitin
B. starch
C. amylose
D. glycogen
A
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Innate immunity begins when
a. triggered by adaptive immunity. b. tissue is damaged. c. white blood cells start dividing. d. complement proteins are released. e. PAMPs are detected
Controls over biosynthesis
What will be an ideal response?
Which of the following features would be found in the epidermis layer of the skin?
A. composed of collagen fibers, cells produce keratin, contain melanocytes, offers a layer of protection against bacteria B. stratified cuboidal epithelium, cells produce keratin, contain melanocytes, offers a layer of protection against bacteria C. stratified squamous epithelium, cells produce keratin, contain melanocytes, offers a layer of protection against bacteria D. stratified squamous epithelium, cells produce keratin, contains a large amount of adipose tissue, offers a layer of protection against bacteria E. stratified squamous epithelium, contains specialized nerve endings, offers a layer of protection against injury
Which of the following is a reason we should care about the extinction of species and work to conserve biological diversity?
A) moral responsibility B) economic benefits C) value of species as indicators of environmental quality D) value of species in maintaining ecosystem function E) all of the above